| 年度 | 实际值 |
|---|---|
| 1992 | 484 |
| 1993 | 504 |
| 1994 | 512 |
| 1995 | 531 |
| 1996 | 541 |
| 1997 | 549 |
| 1998 | 562 |
| 1999 | 573 |
| 2000 | 579 |
| 2001 | 582 |
| 2002 | 586 |
| 2003 | 584.9 |
| 2004 | 588.74 |
| 2005 | 587.27 |
| 2006 | 593.53 |
| 2007 | 598.6 |
| 2008 | 600.22 |
| 2009 | |
| 2010 | 496.68 |
| 2011 | 510.49 |
| 2012 | 505.09 |
| 2013 | 367.7 |
| 2014 | 370.96 |
| 2015 | 375.34 |